<?php
/*
    Copyright (C) 2008 - 2010 Inanta Martsanto
    
    This file is part of Koma.

    Koma is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Koma is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Koma.  If not, see <http://www.gnu.org/licenses/>.
    
    Inanta Martsanto (inanta@inationsoft.com)
*/

class KomaStack extends KomaArray
{   
    function __construct()
    {
        parent::__construct();
    }
    
    function push($value)
    {
        $this->add($value);
    }
    
    function pop()
    {
        if($this->Count == 0) throw new KomaException(); // KomaArrayException
        
        $this->Count--;
        $pop = $this->_array[$this->Count];
        unset($this->_array[$this->Count]);
        
        return $pop;
    }
    
    function peek()
    {
        return $this->_array[$this->Count - 1];
    }
}
?>